Radio Wave Map Control for Unstable Base Station Handover Zones

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Solution Overview

Problem

Existing technologies cannot prevent the switching of base station devices during wireless communication in moving objects, leading to unstable communication, and require frequent handovers, which disrupts connectivity.

Innovation Solution

A radio wave map is provided to determine unstable regions where base station switching occurs, allowing for appropriate communication control based on this information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If base station switching is allowed during wireless communication in moving objects, then communication coverage is improved, but communication stability deteriorates due to frequent handovers

Engineering Contradiction:

Improvecommunication coverage areaVSAvoidcommunication stability

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

The system performs preliminary identification of unstable regions using radio wave maps before communication disruptions occur. By pre-determining areas where base station switching is likely to happen, the system can proactively adjust communication parameters or select alternative base stations, thereby maintaining communication stability while still allowing coverage expansion through base station switching.

Inventive Principle:

Principle #10Preliminary action

2Area of stationary object

If handover between base station devices is performed frequently, then communication coverage is extended, but communication continuity deteriorates

Engineering Contradiction:

Improvecommunication coverage areaVSAvoidcommunication continuity duration

Core Design Contradiction:

Area of stationary objectVSDuration of action of stationary object

Solution Approach 1:

The radio wave map serves as an intermediary information structure that mediates between the need for base station handover and communication continuity. The map provides predictive information about unstable regions, allowing the communication system to make informed decisions about handover timing and selection, thereby extending coverage while minimizing disruptions to communication continuity.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentEP4262262B1Radio wave map provision device, and radio wave map acquisition usage device

Publication Date: 2026.03.25 DENSO CORP

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AI summary

A radio wave map acquisition usage device (150) includes: a request position information acquisition unit (110) acquiring request position information indicating a request position; a transmission unit (105) transmitting a radio wave map request including the request position information to a radio wave map provision device (250); a receiving unit (106) receiving a radio wave map reply including a connection probability indicating a probability of performing wireless communication with each external communication device at a reference position corresponding to the request position information, a lowest guaranteed speed and an estimated speed at the reference position obtained based on the connection probability and a communication speed with each external communication device at the reference position; an unstable region determination unit (111) determining whether the reference position is in an unstable region based on the connection probability; and a communication control unit (113) controlling the wireless communication with each external communication device based on determination result of the unstable region determination unit.